Facial coverings act as source control and reduce the spread of virus from symptomatic, asymptomatic, and pre-symptomatic infected people. Staff may voluntarily wear a facial covering unless the use of a face covering creates a hazard. Personnel are expected to respect staff choices regarding wearing of facial coverings. Personnel choosing to wear an N95 respirator must comply with the guidance on voluntary use of respirators found below.

Appropriate use of facial coverings minimizes transmission because you can spread respiratory virus to others even if you do not feel sick after illness. Appropriate use of facial coverings at the NIH means:

• Wearing a well-fitted KN95, surgical mask, or N95 respirator that covers your nose and mouth, and
• Is constructed of a minimum of two breathable layers, including a synthetic fiber (preferably non-woven) layer, and
• Includes a formable nose piece (i.e., wire or malleable plastic) to allow for forming a tight fit around the nose, and
• Replacing soiled, stained, or damaged face coverings, and
• Using a lab dedicated-disposable surgical mask when in the laboratory conducting work at the bench.

In areas where masks are required, a face shield may not be worn as an alternative if not worn in conjunction with a mask. Staff should evaluate the need for a separate mask to be used during their commute to their worksite and home.

It is strongly recommended that, when worn, cloth facial coverings be changed and laundered daily. If reuse of a facial covering is necessary, facial coverings and/or masks should be stored in paper bags or in some other protective device to reduce the potential for damage or contamination that could occur if the facial covering was placed on a desk or in a backpack, pocket, or purse alone. Paper bags are recommended because the facial covering may be damp from breath condensation, and the paper allows the facial covering to dry out. A plastic bag would trap this condensation inside and not allow the facial covering to dry out.

Voluntary Use of N95 Respirators.

Voluntary use of N95 respirators is permitted at the NIH. However, there are requirements for personnel choosing to use an N95. Personnel wishing to voluntarily use an N95 respirator must complete the Voluntary Respirator Use Certification Form. This form acknowledges that you have watched the brief training video on the limitations, use, and care of N95 respirators, as well as ensuring your supervisor is aware that you are enrolled. Supervisors will need to conduct work assessments to ensure an N95 is appropriate. Personnel must not use an N95 if wearing it creates an additional hazard. They must also enroll in the full respiratory protection program if the use is mandatory rather than voluntary.

Use, Care and Changing of Facial Coverings.

• If you have been sick within the past 5 days and are changing to a mask intended for use in the laboratory, do so at least 6 feet from others to minimize the risk of exposing others.
• Wash your hands with soap or use hand sanitizer containing 60% ethyl or 70% isopropyl alcohol before putting the mask on, before adjusting and after removing.
• Make sure your mouth and nose are fully covered, pull the mask down over your chin and pinch the bridge of the nose. Assure there are no gaps in the mask and that it fits against the side of your face.
• Remove your mask using the ear loops/ties and avoid touching your eyes, nose, and mouth.
• Place your used mask in a paper bag for storage and wash your hands immediately after removing.